<div class="center hero-unit">
  <h1>Welocom to<br> 
  	RATE for beginners<br>

  </h1>

  <h2>
    <br>This is just an introduction app for anyone who wants to use
    <a href="http://rate.pku.edu.cn/">RATE</a>
  </h2>

  <%= link_to "Sign up now!", signup_path, class: "btn btn-large btn-primary" %>
</div>